Generally, yes, as long as sectarianism doesn't define their movement it will result in more positive agitprop. Correctly attacking Capitalism and advocating for Socialism along revolutionary lines is the key here, if they spend their attention on attacking other orgs then they are ultimately wreckers.
And there is no hope in the global south either
Socialist parties here are socialist in name only (most of them at least)
The hardline socialists are dying out leaving only liberals or opprtunists